Won Ryu-Hwan (Kim Soo-Hyun) train in the North Korean particular force. He can talk five language and is besides a deadly violent death machine. Two old age ago, he receive order to deploy to South Korean Peninsula as a spy. While wonder in a hapless vicinity in capital of South Korea, Won Ryu-Hwan pass out and was awaken by a disquieted old female parent. The adult female so let him to populate in a little flat above her modest convenient shop and let him work in her shop.